Jetta L4-2.0L (AEG) (2000)
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Check wires between test box and 4-pin connector for open circuit
according to wiring diagram.
Terminal 3 + socket 53
Terminal 4 + socket 67
Wire resistance: max: 1.5 ohms
Continuation for all connector shapes
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specified value: infinite ohms
If no malfunctions are found in wires:
Vehicles with older connector shape
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Perform a resistance measurement at Engine Coolant Temperature (ECT) Sensor -G62- terminal 1 (Ground -GND-) and 3 (signal).
Vehicles with newer connector shape
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Measure resistance at Engine Coolant Temperature (ECT) sensor -G62-, terminals C (signal) and D (Ground -GND-).
Continuation for all connector shapes